I actually saw this myself (I did not hear through someone else) on one of
the nutrician brochures you can ask for at TacoBell several years ago.

I have never received an email about this, nor did I start one. After
reading your article I dug through the TacoBell website to see if there
was any evidence of this, but it looks like they no longer use that
statement.

I don't know about any schools, prisons, or even any other fast food
restaurants for that matter... But I am 100% sure that TacoBell did at one
point print it in a a nutrician brochure.